A display device includes a transparent substrate having a display region with a plurality of scanning signal lines and video signal lines intersecting thereon, a first terminal formed outside the display region connecting to a first terminal wiring and a second terminal wiring connected to a semiconductor chip, and an inverted staggered thin film transistor. The first terminal includes a first portion, a second portion on the first portion, a third portion having an exposed planar terminal plate on the second portion, a plurality of first vias between the first portion and the second portion, and a plurality of second vias between the second portion and the third portion. The first portion is connected to the first and second terminal wirings, and each of the plurality of first vias is not overlapped with each of the plurality of second vias in plan view.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display device comprising: a substrate having a display region; a plurality of scanning signal lines in the display region, a plurality of video signal lines intersecting the plurality of scanning signal lines in the display region; a first conductive layer on the substrate; a second conductive layer on the first conductive layer; a third conductive layer on the second conductive layer; a first terminal outside the display region on the substrate; a first terminal wiring; and a second terminal wiring, wherein the first terminal connects to the first terminal wiring and the second terminal wiring, wherein the first terminal comprises a portion of the first conductive layer, a portion of the second conductive layer, and a portion of the third conductive layer having an exposed planar terminal on the second conductive layer, wherein a plurality of first vias each of which is connected between the portion of the first conductive layer and the portion of the second conductive layer, and a plurality of second vias each of which is connected between the portion of the second conductive layer and the portion of the third conductive layer, wherein the portion of the first conductive layer has a first region overlapped with the portion of the third conductive layer and a second region not overlapped with the portion of the third conductive layer, wherein each of the plurality of first vias is not overlapped with each of the plurality of second vias in plan view, wherein the second region of the first conductive layer of the first terminal connects to the first terminal wiring and the second terminal wiring, and wherein the portion of the first conductive layer has a slit between the first region and the second region in plan view.
A display device has a substrate with a display region containing scanning signal lines and intersecting video signal lines. A first terminal, located outside the display region, connects to first and second terminal wirings. This first terminal is constructed from three conductive layers. The first layer connects to the terminal wirings and has a slit separating areas overlapping and not overlapping the third layer. Multiple vias connect the first and second layers, and other vias connect the second and third layers. Critically, these two sets of vias do not overlap when viewed from above. The third conductive layer has an exposed flat terminal plate on top of the second conductive layer.
2. The display device according to claim 1 , further comprising: a first insulation film which is formed between the portions of the first and second conductive layers of the first terminal, and a second insulation film which is formed between the portions of the second and third conductive layers of the first terminal, wherein the plurality of first vias and a plurality of third vias are formed in the first insulation film, and the plurality of second vias and a plurality of fourth vias are formed in the second insulation film.
In addition to the display device described previously having a first terminal constructed from three conductive layers and non-overlapping vias, the device further includes insulation films between the conductive layers of the first terminal. A first insulation film is present between the first and second conductive layers, and a second insulation film is present between the second and third conductive layers. The vias connecting the first and second conductive layers, along with additional "third" vias, are formed within the first insulation film. Similarly, the vias connecting the second and third conductive layers, along with additional "fourth" vias, are formed within the second insulation film.
3. The display device according to claim 1 , wherein the first terminal is composed of the first conductive layer, the second conductive layer, and the third conductive layer.
As an alternative to the display device with the specialized terminal, this version simplifies the construction. The first terminal outside the display region, which connects to the first and second terminal wirings, is solely composed of the first, second, and third conductive layers. It maintains the same structure, but emphasizes that no other layers contribute to the terminal's composition. The structure still includes the slit in the first conductive layer, the non-overlapping vias, and the exposed planar terminal on the third conductive layer.
4. The display device according to claim 1 , further comprising: an inverted staggered thin film transistor on the substrate.
In addition to the display device described previously, which includes the specialized terminal, the device includes an inverted staggered thin film transistor (TFT) on the substrate within the display region. This TFT configuration is relevant to driving and controlling the pixels of the display. This adds a specific type of transistor structure to the display device already described.
5. The display device according to claim 1 , wherein a material of the third conductive layer is indium tin oxide.
Regarding the specialized display device with the three-layered terminal, the material of the third conductive layer, which has the exposed planar terminal plate, is indium tin oxide (ITO). This specifies a particular transparent conductive oxide material for the top layer of the terminal structure. This selection is presumably based on its good conductivity and optical transparency characteristics.
6. The display device according to claim 1 , further comprising: wherein the first conductive layer constitutes the second terminal wiring.
The display device, which includes the multi-layered terminal, utilizes the first conductive layer from the first terminal structure to also form the second terminal wiring. This suggests that the first conductive layer serves a dual function, acting both as part of the terminal and as the wiring that connects to it.
7. The display device according to claim 1 , wherein the first terminal wiring has a first connection portion that connects to the first terminal, wherein the second terminal wiring has a second connection portion that connects to the first terminal, and wherein a width of the first connection portion of the first terminal wiring is narrower than a width of the second connection portion of the second terminal wiring.
In addition to the display device described previously, including the three-layered terminal with non-overlapping vias, the widths of the connections to the terminal differ. The first terminal wiring connects to the first terminal via a first connection portion, and the second terminal wiring connects via a second connection portion. The width of the first connection portion on the first terminal wiring is narrower than the width of the second connection portion on the second terminal wiring.
8. The display device according to claim 1 , further comprising: a second terminal outside the display region on the substrate; and a third terminal wiring, wherein the first terminal wiring has a first connection portion that connects to the first terminal, wherein the third terminal wiring has a third connection portion that connects to the second terminal, wherein the second terminal comprises another portion of the first conductive layer, another portion of the second conductive layer, and another portion of the third conductive layer, and wherein a width of the third connection portion of the third terminal wiring is larger than a width of the first connection portion of the first terminal wiring.
The display device with the multi-layered terminal also incorporates a second terminal located outside the display region and a third terminal wiring. The first terminal wiring connects to the first terminal via a first connection portion. The third terminal wiring has a third connection portion that connects to the second terminal. The second terminal itself comprises similar layers to the first: another portion of the first conductive layer, another portion of the second conductive layer, and another portion of the third conductive layer. Crucially, the width of the third connection portion (connecting the third terminal wiring to the second terminal) is larger than the width of the first connection portion (connecting the first terminal wiring to the first terminal).
9. The display device according to claim 8 , further comprising: a pixel electrode and a common electrode for a display, wherein the third terminal wiring is electrically connected to the common electrode.
This display device, featuring two external terminals (first and second), extends the prior description by detailing the use of the second terminal. A pixel electrode and a common electrode are included for image display. The third terminal wiring, connected to the second terminal, is electrically connected to the common electrode. Therefore, the second terminal is responsible for carrying the common electrode signal.
10. The display device according to claim 8 , wherein the second terminal supplies a common signal or a power supply to the display region.
This display device includes the two external terminals (first and second). The second terminal, beyond its physical structure, supplies either a common signal or a power supply voltage to the display region. This specifies the electrical function of the second terminal.
11. The display device according to claim 8 , wherein the first terminal supplies a signal for one of the plurality of scanning signal lines and the plurality of video signal lines to the first terminal wiring, and the second terminal supplies a common signal or a power supply to the display region.
This display device uses two terminals (first and second). The first terminal supplies a signal, used for either the scanning signal lines or the video signal lines, to the first terminal wiring. Simultaneously, the second terminal supplies a common signal or a power supply voltage to the display region. This differentiates the purposes of the two terminals; one carries pixel control signals, the other provides general power or common reference.
12. The display device according to claim 1 , wherein the first terminal wiring has a first connection portion that connects to the first terminal, the first terminal wiring extending along a first imaginary line passing through a center in a width direction of the first connection portion, the second terminal wiring has a second connection portion that connects to the first terminal, the second terminal wiring extending along a second imaginary line passing through a center in a width direction of the second connection portion, and the first imaginary line does not overlap with the second imaginary line.
In addition to the first terminal connected to the first and second terminal wirings, this display device specifies the arrangement of the terminal wirings. The first terminal wiring includes a first connection portion connected to the first terminal. The first terminal wiring extends along a first imaginary line that passes through the center of the first connection portion's width. Similarly, the second terminal wiring includes a second connection portion connected to the first terminal, and extends along a second imaginary line through the center of the second connection portion's width. Importantly, the first and second imaginary lines do not overlap.
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June 8, 2016
July 25, 2017
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